Carbon electrode for electrical bleaching apparatus.



PATENTED MAR. 3, 1908 P. SGHOOP. CARBON ELECTRODE FOB.ELEOTRIGALBLEAGHING APPARATUS.

I APPLIGATION I ILED NOV. 26, 1906.

it enable others skilled in UNITED era "new orrron.

PAUL SOHOOP, OF NUREMBERG, GERMANY.

To all whoin it may concern:

"Be it known that I, PAUL Sorroor, a citi zen of the Republic ofSwitzerland, residing at Nuremberg, Germany, have invented certain newand useful Improvements in or Relating to Carbon Electrodes for-.Electrical Bleaching Apparatus; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill the art to which it appertains to make and use the same.

The carbon electrodes used in electrolysis, especially that of saltsolutions, have to be brought into unvarying metallically conductingcontact. The'metal yoke-shaped conductin' strips used in galvanicelements are not We common metals such as co per, bronze, brass etc.readily get covered in course of time with a layer of oxid which im airsthe originally good contact. On the ot 181 hand the high cost price isa'practical obstaclein the way of employing yokes'made of silver,

platinum or ot er precious metals.-

The present invention has for its object to produce with a minimumconsumption of precious metal a contact that shall be capable ofresisting the corrodin influences to which it is exposed and there oreof remainperinanently efficient. 'With this object in view a series ofholes are made in the carbon electrodes at a part thereof as remote aspossible from the electrolytic liquid and these holes are formed with ascrew thread. *T he-conducting strips of silver, platinum or similar.precious metals may be very thin and have corresponding holes made inthem Specification of Letters Patent.

Application filed November 26. 1906. Serial No. 345.219

adapted for this purpose, because electrode a and the head of the screwb,-

Patented March 3, 1968.

through'which are assed screws made of carbonwhich exact y fit thethread in the electrodes. By tightening up'thc screws the precious metalis pressed firmly against the electrode and a lasting and unvaryingcontact is thereby produced. r

Referring to the drawings, in which like parts are similarlydesignated-Figure 1 is a section, and Fig. 2 a lan View of a smallelectrode haying a metall to. Fig. 3 is a vertical section, and'Fig. 4 a

horizontal section of a carbon electrode hav ing a plurality of leadsconnected thereto.

strip connected there- The carbon electrode a has one or more threadedholes made therein into which fit carbon screws 1) that clam theplatinum or other precious metal lead 0 between the always maintainingclose contact. I

avingnow particularly described endos- -certair ied the nature of thesaid invention and in what manner the same into be performed I declarethatwhat I claim is:

Ina contact for carbon electrodes of ele'ctrolytic apparatus, thecombination with the electrode therein, of a perforated precious metallead and a hard carbon screw passed through theelectrode.

naving a threaded hole formed In testimony that I claim the foregoing vas my invention, I have signed my name in presence of two subscribingwitnesses. v

- PAUL SCHOOP.-

Witnesses:

LOUIS MUELLER, MATHILDE K. HELD.

